转辙机 meaning in Chinese

lever box
point switch

Zd9 zdj9 series electric switch machines
Zd9 zdj9系列电动转辙机
General specifications for switch machines
转辙机通用技术条件
Test methods for electric point machines
电动转辙机的试验方法
Zy series electrohydraulic switch machine
Zy系列电液转辙机
Specification for electrically - driven point - operating machines for railways
铁路用电动道岔转辙机规范

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